URBAN DRAINAGE - REVIEW OF CONTEMPORARY APPROACHES

Recent developments in urban storm drainage are reviewed starting with rainfall/runoff processes, followed by discussions of combined sewage , drainage impacts on receiving waters, impact mitigation, hydroinform atics, regulatory programs and conclusions. The most promising trends in this field include improvements in spatial definition of rainfall d ata, runoff modelling with a limited number of model parameters and re cognition of modelling uncertainties, analytical statistical modelling of runoff quality, advances in the understanding and modelling of sew er sediment transport, the use of biomonitoring and modelling in asses sing drainage impacts on receiving waters, further refinement of best management practices for storm water management, development of new pr ocesses for treatment of storm water, experience with vortex combined sewer overflow structures and their applications in combination with o ther treatment devices, mal time control of sewer system operation, ad vances in hydroinformatics leading to improvements in the integrated m anagement and modelling of drainage systems, interfacing of drainage m odels with geographic information systems, and improved regulation of drainage effluents.